.div-logo{
    text-align: center;
    margin-top: 30px;
    margin-bottom: 50px;
}
.div-login{
    width: 400px;

    margin: 0 auto;
    border: 1px solid #d8dee2;
    background-color: rgb(219, 219, 219);
}
/*输入框宽度*/
.form-control{
    width: 300px;
}
.btn-login{
    width: 300px;
    margin-top: 20px;
    background-color: #2ea44f;
    color: #fff;
}
.btn-back-index{
    width: 300px;margin-top: 10px;background-color: #2e83a4;color: #fff;
}